Abstract
New PPV derivatives which contain electron-withdrawing CF3F 4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4- trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F 4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6- tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF 3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF 3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF 3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F 4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF 3F4P-PPV (0.51 cd/A) was higher than that of CF 3F4P-PPV (0.025 cd/A).
| Original language | English |
|---|---|
| Pages (from-to) | 139-147 |
| Number of pages | 9 |
| Journal | Bulletin of the Korean Chemical Society |
| Volume | 29 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2008 Jan 20 |
| Externally published | Yes |
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Keywords
- Electroluminescence
- Electron-withdrawing group
- Polymer light emitting diodes (PLEDs)
- PPV
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Poly(p-phenylenevinylene)s derivatives containing a new electron-withdrawing CF3F4phenyl group for LEDs. / Jin, Youngeup; Jeung, Hee Kang; Song, Suhee; Sung, Heum Park; Moon, Jihyun; Woo, Han Young; Lee, Kwanghee; Suh, Hongsuk.
In: Bulletin of the Korean Chemical Society, Vol. 29, No. 1, 20.01.2008, p. 139-147.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Poly(p-phenylenevinylene)s derivatives containing a new electron-withdrawing CF3F4phenyl group for LEDs
AU - Jin, Youngeup
AU - Jeung, Hee Kang
AU - Song, Suhee
AU - Sung, Heum Park
AU - Moon, Jihyun
AU - Woo, Han Young
AU - Lee, Kwanghee
AU - Suh, Hongsuk
PY - 2008/1/20
Y1 - 2008/1/20
N2 - New PPV derivatives which contain electron-withdrawing CF3F 4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4- trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F 4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6- tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF 3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF 3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF 3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F 4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF 3F4P-PPV (0.51 cd/A) was higher than that of CF 3F4P-PPV (0.025 cd/A).
AB - New PPV derivatives which contain electron-withdrawing CF3F 4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4- trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F 4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6- tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF 3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF 3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF 3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F 4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF 3F4P-PPV (0.51 cd/A) was higher than that of CF 3F4P-PPV (0.025 cd/A).
KW - Electroluminescence
KW - Electron-withdrawing group
KW - Polymer light emitting diodes (PLEDs)
KW - PPV
UR - http://www.scopus.com/inward/record.url?scp=38949145377&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38949145377&partnerID=8YFLogxK
U2 - 10.5012/bkcs.2008.29.1.139
DO - 10.5012/bkcs.2008.29.1.139
M3 - Article
AN - SCOPUS:38949145377
VL - 29
SP - 139
EP - 147
JO - Bulletin of the Korean Chemical Society
JF - Bulletin of the Korean Chemical Society
SN - 0253-2964
IS - 1
ER -